/**
 * @author DELL
 * @createDate 2016/11/3 16:41
 * @copyright 广州市生物制品有限公司
 * @description 未经本公司许可，不得以任何方式复制或使用本程序任何部分
 */
package ch05;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.DelimiterBasedFrameDecoder;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;

/**
 * 类功能描述: TODO
 *
 * @author 12360
 * @version 1.0
 * @createDate Nov 19, 2015 11:16:44 AM
 */
public class EchoServer {

    public void bind(int port) throws InterruptedException {
        EventLoopGroup bossGroup = new NioEventLoopGroup();
        EventLoopGroup childGroup = new NioEventLoopGroup();

        try {
            ServerBootstrap b = new ServerBootstrap();
            b.group(bossGroup, childGroup)
                    .channel(NioServerSocketChannel.class)
                    .option(ChannelOption.SO_BACKLOG, 100)
                    .handler(new LoggingHandler(LogLevel.INFO))
                    .childHandler(new ChannelInitializer<SocketChannel>() {
                        /**
                         * This method will be called once the {@link Channel} was registered. After the method returns this instance
                         * will be removed from the {@link ChannelPipeline} of the {@link Channel}.
                         *
                         * @param ch the {@link Channel} which was registered.
                         * @throws Exception is thrown if an error occurs. In that case the {@link Channel} will be closed.
                         */
                        protected void initChannel(SocketChannel ch) throws Exception {
                            ByteBuf delimiter = Unpooled.copiedBuffer("$_".getBytes());
                            ch.pipeline().addLast(new DelimiterBasedFrameDecoder(1024, delimiter));
                            ch.pipeline().addLast(new StringDecoder());
                            ch.pipeline().addLast(new EchoServerHandler());
                        }
                    });
            ChannelFuture f = b.bind(port).sync();
            f.channel().closeFuture().sync();
        } finally {
            bossGroup.shutdownGracefully();
            bossGroup.shutdownGracefully();
        }
    }

    public static void main(String[] args) throws InterruptedException {
        int port = 8080;
        new EchoServer().bind(port);
    }

}
